Vehicle lighting apparatus

Details Vehicle lighting apparatus Vehicle lighting apparatus

2006-12-07

2009-12-22

Goins, Davetta W (Department: 2612)

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

C340S815450, C315S291000, C315S307000, C315S077000

Reexamination Certificate

active

07636037

ABSTRACT:
A vehicle lighting apparatus includes a plurality of semiconductor light sources that are connected with each other in series, a switching regulator for supplying an electric power from a power source to each of said plurality of semiconductor light sources, forward voltage detection circuitry for detecting a forward voltage of each group by dividing said plurality of semiconductor light sources into groups; and failure detection circuitry for detecting the failure of the semiconductor light sources belonging to said each group based on the detected output of said each forward voltage detection circuitry. There are arranged between said groups a first voltage detection terminal and a second voltage detection terminal, mutually connected, as the voltage detection terminals connected to the forward voltage detection means to detect at least one of said groups, as well as a first failure detection wiring connecting the semiconductor light sources belonging to one group and said first voltage detection terminal and a second failure detection wiring connecting the semiconductor light sources belonging to the other group and said second voltage detection terminal.

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